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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/mem_dbg.c
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <openssl/crypto.h>
63 #include <openssl/buffer.h>
64 #include <openssl/bio.h>
65 #include <openssl/lhash.h>
68 static int mh_mode
=CRYPTO_MEM_CHECK_OFF
;
69 /* The state changes to CRYPTO_MEM_CHECK_ON | CRYPTO_MEM_CHECK_ENABLE
70 * when the application asks for it (usually after library initialisation
71 * for which no book-keeping is desired).
73 * State CRYPTO_MEM_CHECK_ON exists only temporarily when the library
74 * thinks that certain allocations should not be checked (e.g. the data
75 * structures used for memory checking). It is not suitable as an initial
76 * state: the library will unexpectedly enable memory checking when it
77 * executes one of those sections that want to disable checking
80 * State CRYPTO_MEM_CHECK_ENABLE without ..._ON makes no sense whatsoever.
83 static unsigned long order
= 0; /* number of memory requests */
84 static LHASH
*mh
=NULL
; /* hash-table of memory requests (address as key) */
87 typedef struct app_mem_info_st
88 /* For application-defined information (static C-string `info')
89 * to be displayed in memory leak list.
90 * Each thread has its own stack. For applications, there is
91 * CRYPTO_add_info("...") to push an entry,
92 * CRYPTO_remove_info() to pop an entry,
93 * CRYPTO_remove_all_info() to pop all entries.
100 struct app_mem_info_st
*next
; /* tail of thread's stack */
104 static LHASH
*amih
=NULL
; /* hash-table with those app_mem_info_st's
105 * that are at the top of their thread's stack
106 * (with `thread' as key) */
108 typedef struct mem_st
109 /* memory-block description */
115 unsigned long thread
;
121 static long options
= /* extra information to be recorded */
122 #if defined(CRYPTO_MDEBUG_TIME) || defined(CRYPTO_MDEBUG_ALL)
123 V_CRYPTO_MDEBUG_TIME
|
125 #if defined(CRYPTO_MDEBUG_THREAD) || defined(CRYPTO_MDEBUG_ALL)
126 V_CRYPTO_MDEBUG_THREAD
|
131 static unsigned long disabling_thread
= 0;
133 int CRYPTO_mem_ctrl(int mode
)
137 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
140 /* for applications: */
141 case CRYPTO_MEM_CHECK_ON
: /* aka MemCheck_start() */
142 mh_mode
= CRYPTO_MEM_CHECK_ON
|CRYPTO_MEM_CHECK_ENABLE
;
143 disabling_thread
= 0;
145 case CRYPTO_MEM_CHECK_OFF
: /* aka MemCheck_stop() */
147 disabling_thread
= 0;
150 /* switch off temporarily (for library-internal use): */
151 case CRYPTO_MEM_CHECK_DISABLE
: /* aka MemCheck_off() */
152 if (mh_mode
& CRYPTO_MEM_CHECK_ON
)
154 mh_mode
&= ~CRYPTO_MEM_CHECK_ENABLE
;
155 if (disabling_thread
!= CRYPTO_thread_id()) /* otherwise we already have the MALLOC2 lock */
157 /* Long-time lock CRYPTO_LOCK_MALLOC2 must not be claimed while
158 * we're holding CRYPTO_LOCK_MALLOC, or we'll deadlock if
159 * somebody else holds CRYPTO_LOCK_MALLOC2 (and cannot release
160 * it because we block entry to this function).
161 * Give them a chance, first, and then claim the locks in
162 * appropriate order (long-time lock first).
164 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
165 /* Note that after we have waited for CRYPTO_LOCK_MALLOC2
166 * and CRYPTO_LOCK_MALLOC, we'll still be in the right
167 * "case" and "if" branch because MemCheck_start and
168 * MemCheck_stop may never be used while there are multiple
169 * OpenSSL threads. */
170 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2
);
171 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
172 disabling_thread
=CRYPTO_thread_id();
176 case CRYPTO_MEM_CHECK_ENABLE
: /* aka MemCheck_on() */
177 if (mh_mode
& CRYPTO_MEM_CHECK_ON
)
179 mh_mode
|=CRYPTO_MEM_CHECK_ENABLE
;
180 if (disabling_thread
!= 0)
183 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2
);
191 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
195 int CRYPTO_is_mem_check_on(void)
199 if (mh_mode
& CRYPTO_MEM_CHECK_ON
)
201 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
203 ret
= (mh_mode
& CRYPTO_MEM_CHECK_ENABLE
)
204 && disabling_thread
!= CRYPTO_thread_id();
206 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
212 void CRYPTO_dbg_set_options(long bits
)
217 long CRYPTO_dbg_get_options()
222 static int mem_cmp(MEM
*a
, MEM
*b
)
224 return(a
->addr
- b
->addr
);
227 static unsigned long mem_hash(MEM
*a
)
231 ret
=(unsigned long)a
->addr
;
233 ret
=ret
*17851+(ret
>>14)*7+(ret
>>4)*251;
237 static int app_info_cmp(APP_INFO
*a
, APP_INFO
*b
)
239 return(a
->thread
!= b
->thread
);
242 static unsigned long app_info_hash(APP_INFO
*a
)
246 ret
=(unsigned long)a
->thread
;
248 ret
=ret
*17851+(ret
>>14)*7+(ret
>>4)*251;
252 static APP_INFO
*remove_info()
255 APP_INFO
*ret
= NULL
;
259 tmp
.thread
=CRYPTO_thread_id();
260 if ((ret
=(APP_INFO
*)lh_delete(amih
,(char *)&tmp
)) != NULL
)
262 APP_INFO
*next
=ret
->next
;
267 lh_insert(amih
,(char *)next
);
270 if (ret
->thread
!= tmp
.thread
)
272 fprintf(stderr
, "remove_info(): deleted info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
273 ret
->thread
, tmp
.thread
);
277 if (--(ret
->references
) <= 0)
289 int CRYPTO_add_info_(const char *file
, int line
, const char *info
)
291 APP_INFO
*ami
, *amim
;
294 if (is_MemCheck_on())
298 if ((ami
= (APP_INFO
*)Malloc(sizeof(APP_INFO
))) == NULL
)
305 if ((amih
=lh_new(app_info_hash
,app_info_cmp
)) == NULL
)
313 ami
->thread
=CRYPTO_thread_id();
320 if ((amim
=(APP_INFO
*)lh_insert(amih
,(char *)ami
)) != NULL
)
323 if (ami
->thread
!= amim
->thread
)
325 fprintf(stderr
, "CRYPTO_add_info(): previous info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
326 amim
->thread
, ami
->thread
);
339 int CRYPTO_remove_info(void)
343 if (is_MemCheck_on()) /* _must_ be true, or something went severly wrong */
346 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
348 ret
=(remove_info() != NULL
);
350 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
356 int CRYPTO_remove_all_info(void)
360 if (is_MemCheck_on()) /* _must_ be true */
363 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
365 while(remove_info() != NULL
)
368 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
375 static unsigned long break_order_num
=0;
376 void CRYPTO_dbg_malloc(void *addr
, int num
, const char *file
, int line
,
382 switch(before_p
& 127)
390 if (is_MemCheck_on())
393 if ((m
=(MEM
*)Malloc(sizeof(MEM
))) == NULL
)
399 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
402 if ((mh
=lh_new(mem_hash
,mem_cmp
)) == NULL
)
415 if (options
& V_CRYPTO_MDEBUG_THREAD
)
416 m
->thread
=CRYPTO_thread_id();
420 if (order
== break_order_num
)
427 fprintf(stderr
, "LEVITTE_DEBUG: [%5d] %c 0x%p (%d)\n",
429 (before_p
& 128) ? '*' : '+',
432 if (options
& V_CRYPTO_MDEBUG_TIME
)
437 tmp
.thread
=CRYPTO_thread_id();
440 && (amim
=(APP_INFO
*)lh_retrieve(amih
,(char *)&tmp
)) != NULL
)
446 if ((mm
=(MEM
*)lh_insert(mh
,(char *)m
)) != NULL
)
448 /* Not good, but don't sweat it */
449 if (mm
->app_info
!= NULL
)
451 mm
->app_info
->references
--;
456 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
464 void CRYPTO_dbg_free(void *addr
, int before_p
)
474 if (is_MemCheck_on() && (mh
!= NULL
))
479 mp
=(MEM
*)lh_delete(mh
,(char *)&m
);
483 fprintf(stderr
, "LEVITTE_DEBUG: [%5d] - 0x%p (%d)\n",
484 mp
->order
, mp
->addr
, mp
->num
);
486 if (mp
->app_info
!= NULL
)
488 mp
->app_info
->references
--;
501 void CRYPTO_dbg_realloc(void *addr1
, void *addr2
, int num
,
502 const char *file
, int line
, int before_p
)
507 fprintf(stderr
, "LEVITTE_DEBUG: --> CRYPTO_dbg_malloc(addr1 = %p, addr2 = %p, num = %d, file = \"%s\", line = %d, before_p = %d)\n",
508 addr1
, addr2
, num
, file
, line
, before_p
);
521 CRYPTO_dbg_malloc(addr2
, num
, file
, line
, 128 | before_p
);
525 if (is_MemCheck_on())
528 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC
);
531 mp
=(MEM
*)lh_delete(mh
,(char *)&m
);
535 fprintf(stderr
, "LEVITTE_DEBUG: [%5d] * 0x%p (%d) -> 0x%p (%d)\n",
542 lh_insert(mh
,(char *)mp
);
545 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC
);
554 typedef struct mem_leak_st
561 static void print_leak(MEM
*m
, MEM_LEAK
*l
)
567 struct tm
*lcl
= NULL
;
570 if(m
->addr
== (char *)l
->bio
)
573 if (options
& V_CRYPTO_MDEBUG_TIME
)
575 lcl
= localtime(&m
->time
);
577 sprintf(bufp
, "[%02d:%02d:%02d] ",
578 lcl
->tm_hour
,lcl
->tm_min
,lcl
->tm_sec
);
579 bufp
+= strlen(bufp
);
582 sprintf(bufp
, "%5lu file=%s, line=%d, ",
583 m
->order
,m
->file
,m
->line
);
584 bufp
+= strlen(bufp
);
586 if (options
& V_CRYPTO_MDEBUG_THREAD
)
588 sprintf(bufp
, "thread=%lu, ", m
->thread
);
589 bufp
+= strlen(bufp
);
592 sprintf(bufp
, "number=%d, address=%08lX\n",
593 m
->num
,(unsigned long)m
->addr
);
594 bufp
+= strlen(bufp
);
596 BIO_puts(l
->bio
,buf
);
605 while(amip
&& amip
->thread
== ti
)
611 memset(buf
,'>',ami_cnt
);
612 sprintf(buf
+ ami_cnt
,
613 "thread=%lu, file=%s, line=%d, info=\"",
614 amip
->thread
, amip
->file
, amip
->line
);
616 info_len
=strlen(amip
->info
);
617 if (128 - buf_len
- 3 < info_len
)
619 memcpy(buf
+ buf_len
, amip
->info
, 128 - buf_len
- 3);
624 strcpy(buf
+ buf_len
, amip
->info
);
625 buf_len
= strlen(buf
);
627 sprintf(buf
+ buf_len
, "\"\n");
629 BIO_puts(l
->bio
,buf
);
636 fprintf(stderr
, "Thread switch detected i backtrace!!!!\n");
642 void CRYPTO_mem_leaks(BIO
*b
)
647 if (mh
== NULL
) return;
651 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2
);
652 lh_doall_arg(mh
,(void (*)())print_leak
,(char *)&ml
);
653 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2
);
656 sprintf(buf
,"%ld bytes leaked in %d chunks\n",
663 lh_node_stats_bio(mh
,b
);
664 lh_node_usage_stats_bio(mh
,b
);
668 static void (*mem_cb
)()=NULL
;
670 static void cb_leak(MEM
*m
, char *cb
)
672 void (*mem_callback
)()=(void (*)())cb
;
673 mem_callback(m
->order
,m
->file
,m
->line
,m
->num
,m
->addr
);
676 void CRYPTO_mem_leaks_cb(void (*cb
)())
678 if (mh
== NULL
) return;
679 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2
);
681 lh_doall_arg(mh
,(void (*)())cb_leak
,(char *)mem_cb
);
683 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2
);
687 void CRYPTO_mem_leaks_fp(FILE *fp
)
691 if (mh
== NULL
) return;
692 if ((b
=BIO_new(BIO_s_file())) == NULL
)
694 BIO_set_fp(b
,fp
,BIO_NOCLOSE
);